US Patent Issued to CHU, GUANNAN, HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI on June 3 for "Mold for partially shortening circumference of tube billet and using method of mold" (Chinese Inventors)

ALEXANDRIA, Va., June 4 -- United States Patent no. 12,318,971, issued on June 3, was assigned to CHU, GUANNAN (Weihai, China) and HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI (Weihai, China).

"Mold for partially shortening circumference of tube billet and using method of mold" was invented by Guannan Chu (Weihai, China), Lei Sun (Weihai, China) and Anying Yuan (Weihai, China).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a mold for partially shortening the circumference of a tube billet and a using method of the mold. The mold comprises an upper mold, a lower mold and a mold core used for being inserted into a tube cavity of the tube billet, wherein the upper mold is provided with an upper mold cavit...